Improve logic around marking webpack frames in_app or not.
Improve logic around marking webpack frames in_app or not.

Previously, we only marked frames as out of app, and never marked them
as in our app. "in_app" frames start with './'.

looker/sentry,ifduyue/sentry,alexm92/sentry,mvaled/sentry,JackDanger/sentry,zenefits/sentry,nicholasserra/sentry,mvaled/sentry,ifduyue/sentry,ifduyue/sentry,daevaorn/sentry,looker/sentry,zenefits/sentry,JamesMura/sentry,JamesMura/sentry,fotinakis/sentry,daevaorn/sentry,mvaled/sentry,looker/sentry,JamesMura/sentry,JackDanger/sentry,JamesMura/sentry,zenefits/sentry,BuildingLink/sentry,ifduyue/sentry,mvaled/sentry,jean/sentry,JamesMura/sentry,fotinakis/sentry,alexm92/sentry,mitsuhiko/sentry,ifduyue/sentry,gencer/sentry,gencer/sentry,jean/sentry,BuildingLink/sentry,jean/sentry,looker/sentry,beeftornado/sentry,JackDanger/sentry,daevaorn/sentry,mvaled/sentry,zenefits/sentry,BuildingLink/sentry,beeftornado/sentry,mitsuhiko/sentry,BuildingLink/sentry,alexm92/sentry,daevaorn/sentry,gencer/sentry,gencer/sentry,gencer/sentry,looker/sentry,jean/sentry,fotinakis/sentry,fotinakis/sentry,nicholasserra/sentry,BuildingLink/sentry,zenefits/sentry,beeftornado/sentry,jean/sentry,mvaled/sentry,nicholasserra/sentry